[PATCH v9 00/10] error: auto propagated local_err part I

[Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>]

v9
01: A lot of rewordings [thanks to Eric]
    Still, keep all r-b marks, assuming that they are mostly about macro definition
02: significant changes are:
    1. Do not match double propagation pattern in ERRP_AUTO_PROPAGATE-adding rule
    2. Introduce errp->____->errp scheme to match only functions matched by rule1
       in rules inherited from rule1
    3. Add rules to warn about unusual patterns

    Also, add line to MAINTAINERS to keep error related coccinelle scripts under
    Error section.
07: add Christian's r-b
09: add Eric's r-b
10: a bit of context in xen_block_iothread_create  and qmp_object_add()
    signature are changed. Patch change is obvious, so I keep Paul's r-b

v9 is available at
 https://src.openvz.org/scm/~vsementsov/qemu.git #tag up-auto-local-err-partI-v9
v8 is available at
 https://src.openvz.org/scm/~vsementsov/qemu.git #tag up-auto-local-err-partI-v8

In these series, there is no commit-per-subsystem script, each generated
commit is generated in separate.

Still, generating commands are very similar, and looks like

    sed -n '/^<Subsystem name>$/,/^$/{s/^F: //p}' MAINTAINERS | \
    xargs git ls-files | grep '\.[hc]$' | \
    xargs spatch \
        --sp-file scripts/coccinelle/auto-propagated-errp.cocci \
        --macro-file scripts/cocci-macro-file.h \
        --in-place --no-show-diff --max-width 80

Note, that in each generated commit, generation command is the only
text, indented by 8 spaces in 'git log -1' output, so, to regenerate all
commits (for example, after rebase, or change in coccinelle script), you
may use the following command:

git rebase -x "sh -c \"git show --pretty= --name-only | xargs git checkout HEAD^ -- ; git reset; git log -1 | grep '^        ' | sh\"" HEAD~7

Which will start automated interactive rebase for generated patches,
which will stop if generated patch changed
(you may do git commit --amend to apply updated generated changes).

Note:
  git show --pretty= --name-only   - lists files, changed in HEAD
  git log -1 | grep '^        ' | sh   - rerun generation command of HEAD


Check for compilation of changed .c files
git rebase -x "sh -c \"git show --pretty= --name-only | sed -n 's/\.c$/.o/p' | xargs make -j9\"" HEAD~7

Vladimir Sementsov-Ogievskiy (10):
  error: auto propagated local_err
  scripts: Coccinelle script to use ERRP_AUTO_PROPAGATE()
  hw/sd/ssi-sd: fix error handling in ssi_sd_realize
  SD (Secure Card): introduce ERRP_AUTO_PROPAGATE
  pflash: introduce ERRP_AUTO_PROPAGATE
  fw_cfg: introduce ERRP_AUTO_PROPAGATE
  virtio-9p: introduce ERRP_AUTO_PROPAGATE
  TPM: introduce ERRP_AUTO_PROPAGATE
  nbd: introduce ERRP_AUTO_PROPAGATE
  xen: introduce ERRP_AUTO_PROPAGATE

 scripts/coccinelle/auto-propagated-errp.cocci | 327 ++++++++++++++++++
 include/block/nbd.h                           |   1 +
 include/qapi/error.h                          | 208 +++++++++--
 block/nbd.c                                   |  21 +-
 hw/9pfs/9p-local.c                            |  12 +-
 hw/9pfs/9p.c                                  |   1 +
 hw/block/dataplane/xen-block.c                |  17 +-
 hw/block/pflash_cfi01.c                       |   7 +-
 hw/block/pflash_cfi02.c                       |   7 +-
 hw/block/xen-block.c                          | 125 +++----
 hw/nvram/fw_cfg.c                             |  14 +-
 hw/pci-host/xen_igd_pt.c                      |   7 +-
 hw/sd/sdhci-pci.c                             |   7 +-
 hw/sd/sdhci.c                                 |  21 +-
 hw/sd/ssi-sd.c                                |  26 +-
 hw/tpm/tpm_util.c                             |   7 +-
 hw/xen/xen-backend.c                          |   7 +-
 hw/xen/xen-bus.c                              |  92 +++--
 hw/xen/xen-host-pci-device.c                  |  27 +-
 hw/xen/xen_pt.c                               |  25 +-
 hw/xen/xen_pt_config_init.c                   |  20 +-
 nbd/client.c                                  |   5 +
 nbd/server.c                                  |   5 +
 tpm.c                                         |   7 +-
 MAINTAINERS                                   |   1 +
 25 files changed, 717 insertions(+), 280 deletions(-)
 create mode 100644 scripts/coccinelle/auto-propagated-errp.cocci

Cc: Eric Blake <eblake@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Max Reitz <mreitz@redhat.com>
Cc: Greg Kurz <groug@kaod.org>
Cc: Christian Schoenebeck <qemu_oss@crudebyte.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Anthony Perard <anthony.perard@citrix.com>
Cc: Paul Durrant <paul@xen.org>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Cc: "Philippe Mathieu-Daudé" <philmd@redhat.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Stefan Berger <stefanb@linux.ibm.com>
Cc: Markus Armbruster <armbru@redhat.com>
Cc: Michael Roth <mdroth@linux.vnet.ibm.com>
Cc: qemu-devel@nongnu.org
Cc: qemu-block@nongnu.org
Cc: xen-devel@lists.xenproject.org

-- 
2.21.0